So the device must response to their touches、movings、and draggings in the sametime. Take the “void ccTouchMoved(CCTouch* touch, CCEvent* event)” fuction as an example, can this function identify whoes moving is it? Here is my code, I tested it on an android phone and it worked bad. The two Fixtures’ moving may effect eath other.void HelloWorld::ccTouchMoved(CCTouch* touch, CCEvent* event){ CCPoint touchLocation = touch~~>locationInView ); touchLocation = CCDirector::sharedDirector~~>convertToGL; CCPoint nodePosition = convertToNodeSpace; m_mouseWorld = b2Vec2; if ) { if { m_mouseJoint1~~>SetTarget; } } if ) { if { m_mouseJoint2~~>SetTarget(m_mouseWorld); } }}